Sounds logical. If you house if leaking warm air into the atic which melts snow or ice on the roof which drips over the edge of the house and then refreezes. Presto…icicles.
I say turn up the heat and enjoy!
Even the best insulated house can have icicles if the weather is just right. Bright sun can melt snow on the roof even when the air is below freezing. That’ll give you icicles despite having a well insulated house. If you routinely get icicles in some spots, it can indicate that heat from the house is warming your roof.